I was told this might happen..........
 

Just installed OBX Midpipe, drove around for a bit and now have a P0420 code. I was told that this might happen after installing the pipe but, was never given a fix for this. My cat was starting to go bad before the install and i also put in a new 02S. Has anyone come across this.

This happens to most people that install one. If your under 80,000 the CAT is under a warranty.

The fixes are
Black tape over the CEL light
Purchase a COBB to program the CEL away
Get a used / new CAT replacement.

Keep in mind the CEL doesn't effect the performance of the car.

what expo said.
Is the o2 sensor OEM?

Wow aren't you guys nice today.
This is a total noob stupid question.

Wait ..... is that a cat and a dog living together .......

(ha ha)......yeah.....extremely nice and cordial.....what the hell is up with that?

yay the club is changing behavior , are we taking behavior counseling..

Spring is in the air. The 8's are coming out and everyone is happy.
expo said it right away.
cheap = tape
effective = cobb

oh, ummmmm yeah. That was a retarded question that has been covered a billion times here.
There is a search tool. SEARCH !
We don't need more pointless threads.
Research.
Than search again!!!OMG!!!

I've never really been one to do that so I beat someone to it.

(my car is dirty from winter driving, and I hate springtime)

<queue storm trooper music>
Release your anger, let go of your hate.....
Strike me down and your journey to the darkside shall be complete.
<queue storm trooper music>
Quickly go to ludicrous speed

http://www.youtube.com/watch?v=mk7VWcuVOf0
One of the best scenes in movie history!

Epic......

I work at a mazda dealer as a tech so the cat aint a issue.
Cobb is a good idea.
I wouldn't consider this a nobbie question, just wanted some insite on the cel to see wat other members did to get pass the cel with a midpipe, I know it wont effect the performance of m 8 i do notice some pick up and go with the midpipe installed

^.....................This gets my vote for scariest post of the week for a couple of reasons. :wallbash:



https://www.rx8club.com/attachment.p...2&d=1300622463

I reminded all of a sudden why i don't bring my car to mazda dealerships...

I've had to replace my Rear O2 sensor. Was the rear sensor you replaced? If soooo I would just put the old one back in and save the new one for the new/used catalytic if you ever put one back on.
Actually I've had to replace the front O2 as well .... but that was from the threads being damaged trying to remove it from the OEM header.

No comment

I'm assuming you have a series I RX8. If it's a series II, I do not believe the Cobb AP is a workable solution.

Yes, it is.

Then search and read other members threads instead of being lazy and starting another useless thread that isn't even titled very well.
Part of the reason the search function does not work so well is because people title their threads with these crazy out in left field titles.
Ummmm sorry that last bit is directed at the entire RX8 Community.

Butt dyno's don't count here.
You might have picked up 5-8hp without a tune, maybe, not really butt dyno big enuf to feel.

Whoa....... first let me apologize for these post actually for this thread. I asked an asshole to do something very simple, but when I check my emails this is what I see......FML......

I have already searched and found a reason for my cel and looking into my options. thanks for the suggestions and comments i would have made the same